Date: 2011-01-18 16:22:56

Euclidean geometry

Polygons

Equilateral triangle

Triangle

Equilateral polygon

ThinkFun

Combination puzzles

Puzzles

Geometry

Triangles

Triangle geometry

Coins & Triangles by Kobon Fujimura Home / Puzzle Playground / Puzzles / Word Puzzles / When the centers of any three coins lie in the corners of an equilateral triangle of some size, such coins form an equilateral coin

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